Derrick Becker was a school bus driver for Ryland Heights Elementary, Woodland Middle School and Scott High School, from May 2011 until Nov. 10, 2015, according to a school district spokeswoman.

"Safety is the number one priority in our school district for our students. And as soon as we found out about these criminal charges, we asked for and received his resignation," said Jess Dykes, Kenton County School District's director of public information and community engagement.

Dykes said a background check was done on Becker before he started working for the district, and no charges were found.

Authorities said they do not believe that Becker produced any of the images.

Investigators are still going through the devices they seized at Becker's home and the investigation is ongoing, authorities said.

Becker is charged with one count of possession of child pornography.

Becker was booked into Campbell County jail on Nov. 19, 2015. He is currently out on bond.